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            Characteristics for the 5 patients who developed CIN
          
Characteristics Patients Who Developed CIN
Patient 1 Patient 2 Patient 3 Patient 4 Patient 5
Age, y 75 95 72 34 85
Gender Female Male Female Male Female
Stroke type Ischemic Ischemic Hemorrhagic Hemorrhagic Ischemic
Risk factors for CIN 
    Known history of renal impairment Yes^* Yes^† No No No
    Diabetes Yes No No No Yes
Type of contrast scan and number of scans within 24 hours 1 CTA+CTP 1 CTA+CTP 1 CTA 1 CTA 1 CTA+CTP
Creatinine level known at time of contrast CT? Yes Yes Yes Yes No
GFR day 0, mL/min 46 42 66 166 64
GFR nadir, mL/min 32 29 52 132 43
Creatinine levels, μmol/L 
    Day 0 132 102 54 66 92
    Day 1 167 95 53 80 97
    Day 2 189 85 60 81 133
    Day 3 191 147 68 83 109
Type of contrast Iso-osmolar Low osmolar Low osmolar Low osmolar Low osmolar
Outcome 
    Chronic renal failure No No No No No
    Dialysis No No No No No
Note:—CTA indicates CT angiography; CTP, CT perfusion; CIN, contrast-induced nephropathy; GFR, glomerular filtration rate.
* Diabetic nephropathy.
† Polycystic kidney disease.